Rotatable baffle type muffler



Aug? 169 1949o J. w. JACKSON 254799155 ROTATABLE BAFFLE TYPE MUFFLER I Filed Deo. 28, 1944 v 2 sheets-sheet 1 INVEN TOR.

d'0 sepia W. Jada/sow ATTDRN EYS 2 Sheets-Sheet 2 Filed Deo. 2s, 1944 m w m n mfmf.

Patente'd Aug. 16, 1949 UNITED STATES PATENT OFFICE ROTATABLE BAFFLE TYPE MUFFLER Joseph W. Jackson, Frankfort, Ky.

Application vDecember 28, 1944, Serial No. 570,141

`ll/l'ypresent invention, in its broad aspect,v is an `improvement in mulers and has for its principal 'robject'to more fully retard the explosive eilect of kexhaust gases, and carry such gases through a devious path before discharge into the exhaust pipe thereby to more fully eliminate noise. More particularly, it is my purpose tov provide in conjunction with a core, a sleeve and a shell, a worin baiiie which isturnable with the sleeve and shell and' assists in breaking up the exhaust discharge and consequently eliminating noise.

" tiall'y rotatable unit `formed by the sleeve and casing to which the worm baffle isiattached, whence they pass back into the Vcore on the other side of the partition and are discharged into the exhaustppe. The unit formed -by the sleeve, casing and Worm baiiie vmakes a Ahalf turn or 90 turn upon'each impulse -of--the exhaust, there being amanti-frictionbearing-and vstop to accomplish that end.

Other and equally important objects and advantages of my invention are (l) to provide a Worm baille which turns under the impulse of the exhaust to cushion the impact thereof, break up the gases and retard the explosive effect theree of, (2) to provide in connection with the baie exhaust openings so placed as to lead the exhaust gases through a devious path prior to discharge into the exhaust pipe to further absorb the expansive properties of the gases and reduce noise, and (3) to simplify, improve and render more practical and eiiicient the construction of the muiiier.

Other and equally important objects and advantages of my invention will be apparent as the description proceeds, but changes are permissible in size, shape, form, arrangement and construction of parts, provided the same fall within the purview of what is claimed.

In the drawings wherein I have illustrated a preferred form of my invention:

Figure 1 is a view of an exhaust manifold and exhaust pipe in which my invention is interpolated:

Figure 2 is a sectional side elevation ofV my muler.

Figure 3 is a transverse section taken on the line 3-3 of Figure 2.

6 Claims. (Cl. 181-64) Figure 4 is a transverse sect-ion taken on the line 4 4 of Figure 2.

Figure 5 is a detail View of the worm baiiie.

Figure 5 is a crosssection showing the bearing elements carried by the core and engaging the casing.

Figure 7 is a transverse section taken on the line 'I-l of Figure 2.

Figure 8 is a fragmentary detail showing the form of the stops, and Y Figure 9 is a detail of the bearing collar.

In the drawings wherein like characters of reference are used to designate like or simi-lar parts throughout the several views:

The numeral I designates the exhaust manifold, and 2 the exhaust pipe of an internal coma 'bustion engine 5I. My- `muiiier which is inter polated in the exhaust pipe (as shown in Figure l has a cylindrical Ajacket d. the closed ends 5 of which are xed to the `hollow core S as at l. Exhaust gases are discharged into and out of the core in the direction of the arrows in Figure 2, and the core is `provided with partitions 8 and Alateral openings 9 so that upon 4striking the iirst partim Vtion they pass through the rst opening, and aiter'being operated vupon in the manner hereinafter described return to the core through the rear lateral opening back of the rear partition and are thence discharged into the exhaust pipe 2. The core is provided with a bearing collar II) at the front and rear openings, which collars are also provided with openings II--see Figure 9 and mounted for rotation on the collars within the jacket l and spaced from the front and rear end walls 5 is a partly rotatable baffle unit generally designated by I2 and having a sleeve I3, with openings I4 registering with openings 9 and II, mounted on the bearing collars I. A cylindrical casing I5 has a iront end wall I5 fixed to the sleeve, and a rear end wall I'I ilxed to the sleeve, but located back of the rear edge of the casing to provide an extended portion I8 provided with a pair of stops I9-see Figure 8. Fixedl to the sleeve and casing is a worm baffle 20 a portion of which is turned as at 2l and a portion of which has straight walls as at ZIA. Mounted on the core il beneath the extension I8 of the casing are hollow bearing elements 22 in the ends of which are carried pins 23 and springs 24 pressa ing upon ribs 24 and the collars 25 on pins 23 to urge the pins outwardly. Each pin carries a ball cup 26 in which is a ball 2l pressing upon the inner wall of the extension I8 of the casing in line circumferentially with stops I9. Exhaust gases entering the core are deflected by the forward or rst partition 8 to pass through openings 9 and II with the unit formed by the sleeve I3 and casing I5 whence they strike the worm section 2| of hale 20 rotating the unit I2 until the stops I9 contact with the bearing balls 25 whence the gases are discharged through companion registering openings in the sleeve, collar, and core, back into the core and out through the exhaust. The unit I 2 rotates within the limits dened by the stops I9 and exhaust noises are eiectively minimized.

While I have described in the foregoing a particular construction and arrangement of parts for the purpose of imparting a clear understanding of my invention, my broad inventive concept is only to be determined by reference to the appended claims. Y

I claim:

1. A muiiler, comprising a core to receive the exhaust gases, and provided with lateral openings, partitions in the core to deilect the gases through the openings, a jacket, and a unit in the jacket mounted for limited rotation and having Aopenings to receive the gases from the core and discharge the gases back to the core, and a Worm baille in the unit.

2. A muilier, comprising a hollow core having lateral openings therein and said core being partitioned between the openings, a jacket, bearing members on the core, a sleeve on the bearings and having limited rotational movement, a casing on the sleeve, a worm baille mounted between the casing and the-sleeve, the sleeve and bearing members having openings registering with the openings in the core to admit exhaust gases to the worm baille, and means for limiting the rotational movement of the sleeve and casing assembly.

3. A muiiler, comprising a jacket, a core extend- Ving through the jacket to receive exhaust gases,

a casing in theV jacket mounted for rotation about the core, bearing elements on the core engaging the casing, said casing formed with stops engaging the bearing elements to limit its rota- VVtional movement, bearing collars on the core, a .sleeve `carried by the casing and mounted on 4 the bearing collars, a worm baille between the sleeve and casing and fixed thereto, and openings in the core, the bearing collars and the sleeve to permit exhaust gases to pass to and from the worm baille, and the core having partitions between the openings therein.

4. A muiiler for exhaust gases having a core to receive the gases, a rotationally mounted unit on the core for receiving the gases, means on the core for limiting rotation of said unit, and a worm baiile in said unit for cushioning said gases and minimizing their explosive eect, said worm baille formed with curved positions and straight portions, and anti-friction means forming a bearing for said unit.

5. A muler, comprising a jacket, a cylindrical casing in the jacket and spaced therefrom and having end walls, one of which is spaced from the end of the casing, a sleeve xed to the casing, a worm baiile fixed to and between the sleeve and casing, a core on which the casing is mounted and provided with lateral openings, a partil tion between the openings, the sleeve having openings registering with the openings in the core, and bearing elements carried by the core and engaging the wall of the casing beyond its end.

6. A muiiier, comprising a hollow core, a jacket mounted on the core, a rotationally mounted unit carried by the core within the jacket and said unit and said core formed with opening to admit exhaust gases from the core to the unit, means carried by the core for limiting the rotational movement of the unit, a worm baille in said unit, and said unit formed with a sleeve and a casing supporting the worm baille.

JOSEPH W. JACKSON.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED sTATEs PATENTS 

